import { defineConfig, loadEnv } from "vite";
import createVitePlugins from "./vite/plugins";

const fs = require("fs");
const path = require("path");

// https://vitejs.dev/config/
export default ({ mode, command }) => {
  const env = loadEnv(mode, process.cwd());
  // 全局 scss 资源
  const scssResources = [];
  fs.readdirSync("src/assets/styles/resources").map((dirname) => {
    if (fs.statSync(`src/assets/styles/resources/${dirname}`).isFile()) {
      scssResources.push(`@use "src/assets/styles/resources/${dirname}" as *;`);
    }
  });
  // css 精灵图相关
  fs.readdirSync("src/assets/sprites").map((dirname) => {
    if (fs.statSync(`src/assets/sprites/${dirname}`).isDirectory()) {
      // css 精灵图生成的 scss 文件也需要放入全局 scss 资源
      scssResources.push(`@use "src/assets/sprites/_${dirname}.scss" as *;`);
    }
  });
  return defineConfig({
    base: "./",
    // 开发服务器选项 https://cn.vitejs.dev/config/#server-options
    server: {
      open: true,
      port: 9000,
      host: "0.0.0.0",
      proxy: {
        "/proxy": {
          target: env.VITE_APP_API_BASEURL,
          changeOrigin: command === "serve" && env.VITE_OPEN_PROXY == "true",
          rewrite: (path) => path.replace(/\/proxy/, "")
        }
      }
    },
    // 构建选项 https://cn.vitejs.dev/config/#server-fsserve-root
    build: {
      outDir: mode == "production" ? "dist" : `dist-${mode}`,
      sourcemap: env.VITE_BUILD_SOURCEMAP == "true",
      minify: "terser",
      terserOptions: {
        compress: {
          drop_console: env.VITE_BUILD_DROP_CONSOLE == "true"
        }
      }
    },
    optimizeDeps: {
      include: [
        "element-plus",
        "element-plus/es",
        "element-plus/es/components/message/style/css",
        "element-plus/es/components/notification/style/css",
        "element-plus/es/components/message-box/style/css",
        "element-plus/es/components/loading/style/css"
      ]
    },
    plugins: [
      ...createVitePlugins(env, command === "build"),
      // BUG https://github.com/antfu/unplugin-vue-components/issues/361
      {
        name: "dev-auto-import-element-plus",
        transform(code, id) {
          if (command === "serve" && /src\/main.js$/.test(id)) {
            return {
              code: code.replace(
                "/* importElementPlusPlaceholder */",
                `
                                import ElementPlus from 'element-plus';
                                import 'element-plus/dist/index.css';
                                app.use(ElementPlus);
                            `
              ),
              map: null
            };
          }
        }
      }
    ],
    resolve: {
      alias: {
        "@": path.resolve(__dirname, "src")
      }
    },
    css: {
      preprocessorOptions: {
        scss: {
          additionalData: scssResources.join("")
        }
      }
    }
  });
};
